为什么 git fetch 失败并显示“无法解析主机：(nil)...”与 https://github.com/mxcl/homebrew 来源？
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Why does git fetch fail with "Could not resolve host: (nil)..." with https://github.com/mxcl/homebrew origin?
提问by Daryl Spitzer
I was unable to install Homebrew(see my question on apple.stackexchange.com), so I looked at the https://raw.github.com/mxcl/homebrew/goRuby script and tried the same commands it runs:
我无法安装Homebrew（请参阅我在 apple.stackexchange.com 上的问题），所以我查看了https://raw.github.com/mxcl/homebrew/goRuby 脚本并尝试了它运行的相同命令：
$ git init -q
$ git remote add origin https://github.com/mxcl/homebrew
$ git fetch origin master:refs/remotes/origin/master -n
error: Could not resolve host: (nil); nodename nor servname provided, or not known while accessing https://github.com/mxcl/homebrew/info/refs?service=git-upload-pack
fatal: HTTP request failed
Why am I getting this error?
为什么我收到这个错误？
Update:(in response to madhead's answer)
更新：（回应madhead的回答）
I get the same problem when I use the URL with .gitpostfixed:
当我使用带有.git后缀的 URL 时，我遇到了同样的问题：
$ git init -q
$ git remote add origin https://github.com/mxcl/homebrew.git
$ git fetch origin master:refs/remotes/origin/master -n
error: Could not resolve host: (nil); nodename nor servname provided, or not known while accessing https://github.com/mxcl/homebrew.git/info/refs?service=git-upload-pack
fatal: HTTP request failed
Update #2:
更新#2：
I don't think this was a proxy issue (as suggested in neil'sanswer).
我不认为这是代理问题（正如尼尔的回答中所建议的那样）。
I tried this again and it worked!
我又试了一次，它奏效了！
$ git init -q
$ git remote add origin https://github.com/mxcl/homebrew
$ git fetch origin master:refs/remotes/origin/master -n
remote: Counting objects: 126721, done.
remote: Compressing objects: 100% (59085/59085), done.
remote: Total 126721 (delta 89963), reused 100145 (delta 66623)
Receiving objects: 100% (126721/126721), 19.68 MiB | 702 KiB/s, done.
Resolving deltas: 100% (89963/89963), done.
From https://github.com/mxcl/homebrew
* [new branch] master -> origin/master
I looked in my ~/.gitconfigfile and discovered I had already defined a proxy. I think that was already there when I had the problem, but to confirm I removed it and got a different error:
我查看了我的~/.gitconfig文件，发现我已经定义了一个代理。我认为当我遇到问题时它已经存在了，但是为了确认我删除了它并得到了一个不同的错误：
$ git fetch origin master:refs/remotes/origin/master -n
error: Failed connect to github.com:443; Connection refused while accessing https://github.com/mxcl/homebrew/info/refs?service=git-upload-pack
fatal: HTTP request failed
My theory is that github or homebrew had some kind of problem that they've since fixed.
我的理论是 github 或 homebrew 有一些他们已经修复的问题。
采纳答案by Neil
For me this was related to a proxy issue. When I'm on VPN I need to add
对我来说，这与代理问题有关。当我使用 VPN 时，我需要添加
[http]
proxy = http://proxy.example.com
to my ~/.gitconfig, and if I'm not on the VPN, this proxy cannot be found.
到我的~/.gitconfig，如果我不在 VPN 上，则无法找到此代理。
回答by user63497
For those getting this error when NOT behind a proxy:
对于那些不在代理后面时收到此错误的人：
error: Could not resolve host: (nil); nodename nor servname provided, or not known while accessing https://github.com/mxcl/homebrew/info/refs?service=git-upload-pack
fatal: HTTP request failed
the solution may be to clear the git proxy settings:
解决方案可能是清除 git 代理设置：
$ git config --global --unset core.gitproxy
回答by madhead
You remote URL is incorrect, it should be https://github.com/mxcl/homebrew.git(.gitpostfixed) instead of https://github.com/mxcl/homebrew. You can copypaste URLs from Github UI to prevent such typos.
您的远程 URL 不正确，它应该是https://github.com/mxcl/homebrew.git( .gitpostfixed) 而不是https://github.com/mxcl/homebrew. 您可以从 Github UI 复制粘贴 URL 以防止此类拼写错误。
